Deep Infrared Imaging of the R Corona Australis Cloud Core
نویسندگان
چکیده
Preliminary analysis is presented for J, H, and K 0 images of the Corona Australis cloud core. Color-color and color-magnitude diagrams reveal relatively few new cluster members. We conclude that the R Cr A infrared cluster consists of only about 30 members and its size reeects the available reservoir of molecular gas.
منابع مشابه
The Corona Australis Star Forming Region
At a distance of about 130 pc, the Corona Australis molecular cloud complex is one of the nearest regions with ongoing and/or recent star formation. It is a region with highly variable extinction of up to AV ∼ 45 mag, containing, at its core, the Coronet protostar cluster. There are now 55 known optically detected members, starting at late B spectral types. At the opposite end of the mass spect...
متن کاملHigh Spatial Resolution Observations of Two Young Protostars in the R Corona Australis Region
We present multi-wavelength, high spatial resolution imaging of the IRS 7 region in the R Corona Australis molecular cloud. Our observations include 1.1 mm continuum and HCO J = 3 → 2 images from the SMA, CO J = 3 → 2 outflow maps from the DesertStar heterodyne array receiver on the HHT, 450 μm and 850 μm continuum images from SCUBA, and archival Spitzer IRAC and MIPS 24 μm images. The accurate...
متن کاملThe very low - mass population of the Corona Australis and Chamaeleon II star forming regions ⋆
We present the results of a deep optical survey in the Corona Australis and Chamaeleon II star forming regions. Our optical photometry is combined with available nearand mid-infrared photometry to identify very low-mass candidate members in these dark clouds. In our Chamaeleon II field, only one object exhibits clear Hα emission, but the discrepancy between its optical and near-infrared colours...
متن کاملInfrared Spectra of Young Stars Embedded in the R Coronae Australis Cloud
Infrared spectra are presented for a magnitude-limited (K < 12:5 mag) sample of stellar objects observed toward the R Coronae Australis molecular core. These spectra, which are used to identify young stellar objects in the cloud, include the wavelengths of emission lines from [Fe II] andH2, four of the Brackett series lines, the CO bandheads, as well as photospheric absorption lines of Al, Na, ...
متن کاملHCO + ( J = 4 − 3 ) mapping of the molecular disk around IRS 7 in Corona Australis ?
Submillimetre HCO+(J = 4− 3) mapping observations of the immediate environs of the infrared source IRS 7 in Corona Australis have provided corroborative evidence for the existence of the rotating molecular disk detailed in our earlier paper. An improved estimate of 0.8M for the mass of the central protostar is obtained.
متن کامل